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. 2015 Aug 24;9:289. doi: 10.3389/fnins.2015.00289

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Copyright © 2015 Christie and Schrater.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution and reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Performance curves illustrating the relationship between resource utilization and performance. Different curves can represent either different policies/strategies for the same task or different tasks. Note that as resources are depleted, the maximum possible energy utilization rate drops (see Figure 2C), creating the possibility of a different strategies or task being optimal based on energy dynamics alone. This provides a natural explanation for task or strategy switching as a result of fatigue.